Highlights based on this e-bike’s specs, comparisons and practical strengths.
100
Excellent battery efficiency
The bike appears to get strong range from its battery size.
The bike appears to get strong range from its battery size.
The calculated range per battery unit is 140.
94
Excellent rider information and controls
The included display or control unit should give useful ride information and control.
The included display or control unit should give useful ride information and control.
Multiple ride modes should give the rider more control over assistance levels.
Torque and cadence sensing should improve how precisely the bike responds to rider input.
Built-in lights add useful everyday control and visibility integration.
87
Excellent smooth power delivery
Torque and cadence sensing should help the motor deliver more natural and controlled assistance.
Torque and cadence sensing should help the motor deliver more natural and controlled assistance.
Multiple ride modes should help riders choose a smoother level of assistance.
The included display or control unit should make it easier to manage assistance levels.
84
Useful built-in lights
Built-in lights are included, which is useful for commuting and low-light riding.
Built-in lights are included, which is useful for commuting and low-light riding.
The display or control unit may make light and ride-status management easier.
81
Good charging speed
Charging time is low compared with similar e-bikes.
Charging time is low compared with similar e-bikes.
The quoted charging time is long in absolute terms.
77
Good value for money
The price/value label suggests this bike is very strong value compared with similar options.
The price/value label suggests this bike is very strong value compared with similar options.
The listed price is GBP 2,650.
The bike appears to save around GBP 2,013 versus the average.
Payload capacity is strong compared with similar e-bikes.
Torque and cadence sensing adds value by improving assist control and ride feel.
Built-in lights add practical everyday value.
The included display or control unit adds useful everyday value.
The bike has 10 or more gears, which adds useful drivetrain range.
The bike appears to be a recent or current model.
The release age is recent, which supports value if pricing is competitive.
63
Decent everyday equipment
Built-in lights add useful everyday practicality.
Built-in lights add useful everyday practicality.
The included display or control unit adds useful ride information for daily use.
Multiple ride modes should help adapt the bike to different everyday journeys.
Payload capacity is average or better, which helps with bags, shopping or daily kit.
60
Mixed range-to-weight balance
The bike is very light compared with similar e-bikes, which strongly supports range-to-weight balance.
The bike is very light compared with similar e-bikes, which strongly supports range-to-weight balance.
Battery efficiency appears strong, which supports a better range-to-weight balance.
The calculated range per kg is 2.43.
The calculated range per battery unit is 140.
59
Mixed liftability
The bike is very light compared with similar e-bikes, which should make it easier to lift and move.
The bike is very light compared with similar e-bikes, which should make it easier to lift and move.
The listed weight is 14.4 kg.
The aluminium frame material is a practical lightweight choice for many e-bikes.
The mountain bike format can be bulkier and harder to lift than simpler urban e-bikes.
51
Average power-to-weight ratio
Power-to-weight is average for this type of e-bike.
Power-to-weight is average for this type of e-bike.
Motor power is low compared with similar e-bikes.
The bike is lighter than many similar e-bikes, which helps the power-to-weight balance.
The calculated power-to-weight score is 17.36.
Overview
The Merida eSILEX 400 is a mountain bike designed for trail riding, offering smooth and controlled motor support that feels natural with its torque and cadence sensor. It makes good use of its battery, delivering a useful range for most trail adventures, and charges relatively quickly for convenience. However, its lower motor power and torque may make steep climbs feel more challenging, and the lack of suspension could make rough terrain less comfortable. The non-removable battery means you'll need to keep the whole bike near a power source for charging.
Best For
✓
This mountain e-bike should suit trail riders who prioritize natural power delivery and efficient battery use, especially on mixed terrain. Its smooth assistance and responsive torque sensor make it feel more intuitive for riders who want control over their effort. The lightweight design and strong carrying capacity also make it a practical choice for those who need to carry gear or tackle varied trails. Riders looking for a reliable, value-focused mountain e-bike with good charging speed may find this model particularly appealing.
Who Should Avoid It
×
Riders who frequently tackle steep hills or long off-road rides may want to compare alternatives, as the motor power and torque are below average for similar mountain e-bikes, which could affect climbing performance. Riders who need a larger battery for extended range may also find stronger options in the same category. However, the bike still offers good value for money and smooth power delivery, which may suit riders prioritizing efficiency and affordability over maximum power or range.
Ownership considerations
These points highlight practical ownership factors such as maintenance, storage, charging, everyday
handling and bad-weather usability.
17
More maintenance likely
Poor
Chain drive is common and serviceable, but needs more cleaning and lubrication than a belt drive.
Chain drive is common and serviceable, but needs more cleaning and lubrication than a belt drive.
Tyres are listed, but there is no clear puncture-protection signal.
The aluminium frame material is practical for everyday use and general maintenance.
Built-in lights reduce the need to manage separate lighting accessories.
The mountain bike format may involve more wear from rougher riding and more complex components.
A higher number of gears can add drivetrain complexity.
17
Limited storage practicality
Poor
The frame does not appear to fold, so storage will depend more on size and weight.
The frame does not appear to fold, so storage will depend more on size and weight.
The bike is lighter than many similar e-bikes, which should make storage and moving it around easier.
59
Mixed liftability
Mixed
The bike is very light compared with similar e-bikes, which should make it easier to lift and move.
The bike is very light compared with similar e-bikes, which should make it easier to lift and move.
The listed weight is 14.4 kg.
The aluminium frame material is a practical lightweight choice for many e-bikes.
The mountain bike format can be bulkier and harder to lift than simpler urban e-bikes.
6
No removable battery advantage
Poor
The battery does not appear to be removable, so the whole bike may need to be near a charging point.
The battery does not appear to be removable, so the whole bike may need to be near a charging point.
This bike type can be larger or heavier, so a removable battery adds useful charging flexibility.
81
Good charging speed
Good
Charging time is low compared with similar e-bikes.
Charging time is low compared with similar e-bikes.
The quoted charging time is long in absolute terms.
100
Excellent battery efficiency
Excellent
The bike appears to get strong range from its battery size.
The bike appears to get strong range from its battery size.
The calculated range per battery unit is 140.
63
Decent everyday equipment
Mixed
Built-in lights add useful everyday practicality.
Built-in lights add useful everyday practicality.
The included display or control unit adds useful ride information for daily use.
Multiple ride modes should help adapt the bike to different everyday journeys.
Payload capacity is average or better, which helps with bags, shopping or daily kit.
21
Limited bad-weather practicality
Poor
Built-in lights are useful for rain, low light and darker commutes.
Built-in lights are useful for rain, low light and darker commutes.
The mountain bike format should offer useful control on rough or slippery surfaces.
A very light e-bike may feel less planted in poor weather or windy conditions.
The wheel size should be workable for regular poor-weather riding, depending on tyre choice.
Frame material is listed as aluminium, which gives useful durability and maintenance context.
34
Some family utility limitations
Weak
Payload capacity is above average for this type of e-bike.
Payload capacity is above average for this type of e-bike.
The listed maximum payload should be useful for family or utility riding.
The listed maximum payload is 150 kg.
Built-in lights are useful for school runs, errands and daily utility riding.
Where to buy
Priced at £2,650, the Merida eSILEX 400 looks favourably positioned against similar 2025 mountain e-bikes, offering a competitive balance of performance and features. Its value is supported by a well-rounded spec, though potential trade-offs may exist in more niche components.
Compared with similar mountain bike e-bikes on Bikkerr, this model sits £3,008.07 below average
The Merida eSILEX 400 is listed at £2,650, which sits comfortably against similar mountain e-bikes from 2025, offering a price that feels reasonable for the features included. It compares well with rivals in terms of efficient battery use and a payload capacity that should handle most trail demands, while the torque-sensing assistance adds a natural feel to the ride. However, some similar e-bikes may offer a larger battery or more range, and others might provide stronger climbing support, which could be important for more demanding off-road use. For a mountain e-bike, the trade-off here seems to be between a lighter, more agile frame and a slightly smaller battery, which may appeal more to riders who prioritize handling and responsiveness over extended range. Buyers who value a nimble ride and don’t need the longest possible range may find the Merida eSILEX 400 offers a compelling balance, though those needing more power for steep climbs or longer rides might want to explore alternatives with larger batteries.
We reach this value score by combining the bike’s price, specification, performance data and comparison against similar e-bikes in our database.
77
The price/value label suggests this bike is very strong value compared with similar options.
The listed price is GBP 2,650.
The bike appears to save around GBP 2,013 versus the average.
Payload capacity is strong compared with similar e-bikes.
Torque and cadence sensing adds value by improving assist control and ride feel.
Built-in lights add practical everyday value.
The included display or control unit adds useful everyday value.
The bike has 10 or more gears, which adds useful drivetrain range.
The bike appears to be a recent or current model.
The release age is recent, which supports value if pricing is competitive.
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Potential limitations
Areas where this e-bike may be less strong based on its specs and comparisons.
0
Limited motor punch
Motor power is low compared with similar e-bikes.
Motor power is low compared with similar e-bikes.
Torque is low compared with similar e-bikes.
Power-to-weight is average for this type of e-bike.
Torque-sensing assistance should make the motor response feel more natural.
The bike is lighter than many similar e-bikes, which should help responsiveness.
The calculated power-to-weight score is 17.36.
0
Not ideal for steep hills
Torque is low compared with similar e-bikes.
Torque is low compared with similar e-bikes.
Power-to-weight is average for this type of e-bike.
Motor power is low compared with similar e-bikes.
The torque-sensing assistance should help the bike respond more naturally on climbs.
The bike has 10 or more gears, which should help on varied climbs.
The bike is lighter than many similar e-bikes, which should help on climbs.
The calculated power-to-weight score is 17.36.
0
Limited downhill control
No suspension may reduce control and comfort on rough or steeper descents.
No suspension may reduce control and comfort on rough or steeper descents.
The mountain bike design should be better suited to controlled descending.
0
Limited braking confidence
There is not enough brake type, brake specification, weight, or motor power data to judge braking confidence confidently.
0
Limited commuting practicality
The mountain bike format is less commuting-focused and may be less efficient for daily urban use.
The mountain bike format is less commuting-focused and may be less efficient for daily urban use.
Range is low compared with similar e-bikes, which may limit commuting flexibility.
Charging time is average or better, which is useful for regular commuting.
Built-in lights are useful for commuting and low-light riding.
A non-removable battery can make charging less flexible.
The display or control unit should make it easier to monitor assist level and battery use.
Payload capacity is strong compared with similar e-bikes, which helps with bags, shopping or extra kit.
The bike is lighter than many similar e-bikes, which helps with daily handling.
0
Limited rough-road comfort
No suspension may make rough roads, potholes and uneven paths feel harsher.
No suspension may make rough roads, potholes and uneven paths feel harsher.
The wheel size should be workable for rough roads and everyday uneven surfaces.
The mountain bike format is generally better suited to rougher terrain.
A very light bike may feel less planted over rough or broken surfaces.
Frame material is listed as aluminium, which gives useful comfort and build context.
0
Low battery capacity
Battery capacity is low compared with similar e-bikes.
Battery capacity is low compared with similar e-bikes.
The listed battery capacity is relatively small in absolute terms.
6
No removable battery advantage
The battery does not appear to be removable, so the whole bike may need to be near a charging point.
The battery does not appear to be removable, so the whole bike may need to be near a charging point.
This bike type can be larger or heavier, so a removable battery adds useful charging flexibility.
E-system & battery comparison
Motor Power
250 watts
▼ 190 W below average
Motor Torque
45 Nm
▼ 33 Nm below average
Power-to-weight
17.36 W/kg
▼ 3.0 W/kg below average
Battery Capacity
250 Wh
▼ 381 Wh below average
Claimed Max Range
35 miles
▼ 26 miles below average
Charge Time
3h 30m
▼ 105 mins faster than average
Sensor Type
Torque and Cadence Sensor
Removable Battery
No
Motor Name
Mahle X 30
This mountain e-bike offers a legal-style pedal assist that feels more modest in climbing support compared to some trail-focused rivals, making it better suited for less aggressive terrain. Next to similar e-bikes, its assistance is likely to feel more balanced and natural, with torque and cadence sensing helping to maintain predictable power delivery. Climbing steeper trails may require more rider effort, especially when carrying heavier loads, though the motor should still provide enough support for moderate trail use. The low weight of the bike contributes to a more agile feel, reducing the need for overly aggressive motor output, and the assistance should feel smooth and responsive across different riding conditions. Riders looking for a lightweight mountain e-bike that prioritizes efficiency and trail control over maximum power may find this motor setup well-suited to their needs.
This explanation is based on the bike’s motor power, torque, battery capacity, claimed range, charging
time, sensor type and how those figures compare with similar e-bikes in our database.
eBike FAQs
Is this bike suitable for long off-road rides?
The Merida eSILEX 400 is a mountain bike, but its lower motor power and torque may make steep climbs feel more challenging. The bike has a useful range for most trail adventures, but rough terrain may feel less comfortable due to the lack of suspension. If you're looking for a bike for long off-road rides, you might want to consider models with more powerful motors and better suspension for a smoother experience.
How does the motor perform when climbing steep trails?
The Merida eSILEX 400's 250W motor with 45Nm of torque provides smooth and controlled assistance, but it may struggle on very steep trails due to its lower motor power and torque compared to similar e-bikes. You'll likely need to pedal more actively on steep inclines, and the bike's lack of suspension may make rough terrain feel less comfortable. However, the motor's smooth delivery should still make climbing manageable for most trail conditions.
Does the bike offer enough battery range for regular mountain biking trips?
The Merida eSILEX 400 offers a range of 35 miles on a single charge, which should be sufficient for most regular mountain biking trips, especially on moderate trails. However, if you frequently tackle longer or more demanding routes, you may need to plan for additional charging stops. The non-removable battery means you'll need to keep the bike near a power source for charging, which could be a consideration for extended trips.
How comfortable is the ride on rough or uneven terrain?
The Merida eSILEX 400 is designed for trail riding, but its lack of suspension may make rough or uneven terrain feel less comfortable, especially over long rides or on technical trails. While the motor provides smooth support, the lower torque and power may not offer much assistance when navigating particularly harsh or uneven surfaces. For riders prioritizing comfort on rough terrain, a bike with front or full suspension would likely be more suitable.
Is this bike good value for money compared to similar e-bikes?
The Merida eSILEX 400 offers a reasonable balance of features for its price, especially with its efficient battery use and smooth power delivery. While it may not match higher-end models in motor power or battery capacity, it should still handle most trail rides comfortably. The non-removable battery is a minor inconvenience, but the overall package seems to provide good value for casual to moderate mountain bikers looking for a reliable and affordable e-bike.
Can I easily charge the battery without removing it from the bike?
No, the battery on the Merida eSILEX 400 is not removable, so you'll need to charge the bike as a whole. This means you'll have to keep the bike near a power source whenever you need to recharge, which may be less convenient if you're out on a trail and need to top up. However, the charging speed is relatively quick, which helps offset some of the inconvenience.
How does the power delivery feel during trail riding?
The power delivery on the Merida eSILEX 400 feels smooth and controlled during trail riding, thanks to its torque and cadence sensors that help the motor respond naturally to your pedaling effort. However, the lower motor power and torque may result in a less punchy feel when accelerating or climbing steeper sections, requiring more effort from the rider. This makes it better suited for moderate trails rather than technical or steep terrain.
What are the main limitations of this bike for serious mountain biking?
This bike may struggle with serious mountain biking due to its lower motor power and torque, which could make steep climbs feel more challenging. It also lacks suspension, so rough terrain might feel less comfortable. The non-removable battery means you'll need to keep the whole bike near a power source for charging, which could be inconvenient on longer trips.
eBike Overview
eBike Type: Mountain Bike
The style of riding intended for this bike
Released:
2025
The bike was released 1 years ago
Screen
Mahle iWoc ONE
Lights Included
Yes
Weight (inc battery): 14.4 kg
The website average for electric bikes is
22.99 kg.
This electric bike is 8.6 kg under the average. Total bike weight may vary depending on frame size.
Sizing & Geometry
Min / Max Rider Height
S 155–165 cm (5'1"–5'5") | M 165–175 cm (5'5"–5'9") | L 175–185 cm (5'9"–6'1") | XL 185–195 cm (6'1"–6'5")
Adjustable Sizing
Adjustable saddle height
Folded Dimensions
n/a
Wheel & Tire Details
Wheelset Name
Merida Expert SL (22 mm inner width, Tubeless Ready)
Wheelset Size
700c
Tires
Maxxis Rambler
Frame Info
Frame Material
Aluminium
Suspension Type
No suspension
Foldable Frame
No
Max Payload
150 kg (330.7 lbs)
Drivechain Details
Groupset details
Shimano GRX400 / HG50
Drivechain type
Chain drive
Shifters
Shimano GRX 400 (Dual Control levers)
Amount of gears
10 Gears
Rear Derailleur
Shimano GRX 400
Front Derailleur
Shimano GRX 400
Cassette
Shimano CS-HG 50 (11-36 teeth, 10-speed)
Cranks
Shimano GRX 600 (46-30 teeth)
Chain
KMC e 10
Bottom Bracket
Mahle X 30 specific (integrated with torque sensor)
Brakes
Brakes
Shimano GRX400
Brake Type: Unknown / Not Specified
Hydraulic operated discs brakes (Very good)
Brake Rotors
Shimano RT 10 (160 mm front and rear)
Shifters
Shimano GRX 400 (Dual Control levers)
Other Components
Saddle
Unknown
Handlebars
Unknown
Bar Tape
Unknown
Manufactures Info
Worldwide Shipping:
Yes
Delivery across the globe!
Warranty:
2 Years
Limited warranty website average:
3.12 years
Sometimes a small push is all that's needed to open up a whole new world of exploration. The eSILEX 400 pairs a sleek, lightweight frame with versatile gravel tyres on 700c rims to the helping hand of the latest MAHLE ebikemotion X30 hub drive motor and a 237 Wh battery to help expand your riding horizons. A fully-featured frame and carbon fork with plenty of mounts is ideal for overnight bikepacking trips or smaller adventures, while the smooth ... Read More
Sometimes a small push is all that's needed to open up a whole new world of exploration. The eSILEX 400 pairs a sleek, lightweight frame with versatile gravel tyres on 700c rims to the helping hand of the latest MAHLE ebikemotion X30 hub drive motor and a 237 Wh battery to help expand your riding horizons. A fully-featured frame and carbon fork with plenty of mounts is ideal for overnight bikepacking trips or smaller adventures, while the smooth shifting and powerful braking of the Shimano GRX groupset with double chainset makes for reliable companions, on or off the road. If you are often looking for the off-road alternative when you are out on your bike or simply enjoy exploring the path unknown, then the eSILEX might be the perfect assisted bike for you. The latest rear-hub MAHLE X30 system with integrated battery offers a neutral support level whenever your journey requires some e-motor assistance. You can even use an externally mounted 208 Wh MAHLE Range Extender to boost range. Depending on where you want to take it, the eSILEX is available in the more rugged 650b or the more fast-rolling 700c set-up. Both versions come with gravel/off-road tyres for extra grip. A large number of fixing points on the frame as well as the fork, turn the eSILEX into an adventure rig without any fuss.
